A、30.2° B、30.8° C、31.8° D、35°
A、篩過粉占總粉的15%±1% B、篩過粉占總粉的20%±1% C、篩過粉占總數(shù)的25%±1% D、篩過粉占總粉的40%±1%
A、0.02% B、0.03% C、0.04% D、0.05%